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2024年秋冬季梨科學(xué)施肥指導(dǎo)意見

2024-09-20 08:56:53 來源:全國農(nóng)技推廣中心 閱讀量:10605 評論

導(dǎo)讀:梨園土壤有機質(zhì)含量較低,鈣、鐵、鋅、硼等中微量元素缺乏普遍,南方地區(qū)梨園土壤酸化嚴重,磷、鉀、鈣、鎂缺乏。

 
施肥原則
 
  梨園土壤有機質(zhì)含量較低,鈣、鐵、鋅、硼等中微量元素缺乏普遍,南方地區(qū)梨園土壤酸化嚴重,磷、鉀、鈣、鎂缺乏。生產(chǎn)中有機肥施用不足,氮磷肥投入量大,中微量元素投入較少,施肥時期、施肥方式、肥料配比不合理。針對上述問題,提出以下施肥原則:
 
  (1)增施有機肥,實施綠肥種植和秸稈覆蓋,培肥土壤。土壤酸化嚴重的果園施用石灰和有機肥進行改良,適當減少化學(xué)氮肥施用.
 
  (2)依據(jù)梨園土壤肥力、產(chǎn)量水平和梨樹生長狀況,確定肥料施用時期、用量和養(yǎng)分配比,適當減少氮磷肥用量,適量施用鉀肥,通過多種途徑補充鈣、鎂、鐵、鋅、硼等中微量元素。
 
  (3)優(yōu)化施肥方式、施肥時期和養(yǎng)分配比,灌溉與施肥合理配合,推廣水肥一體化技術(shù)。
 
  (4)秋季高溫和多雨地區(qū),注意及時排水,適當降低氮肥用量,控制營養(yǎng)生長,穩(wěn)定樹勢。必要時配合磷鉀葉面肥噴施植物生長調(diào)節(jié)劑,控旺促成花。
 
 
施肥建議
 
  (1)畝產(chǎn)4000公斤以上的果園,施用有機肥3—4方/畝,氮肥(N)10—15公斤/畝,磷肥(P2O5)5—8公斤/畝,鉀肥(K2O)6—10公斤/畝;畝產(chǎn)2000—4000公斤的果園,有機肥3—4方/畝,氮肥(N)8—10公斤/畝,磷肥(P2O5)4—7公斤/畝,鉀肥(K2O)8—10公斤/畝;畝產(chǎn)2000公斤以下的果園,有機肥3—4方/畝,氮肥(N)5—8公斤/畝,磷肥(P2O5)3—6公斤/畝,鉀肥(K2O)5—8公斤/畝。
 
  (2)土壤鈣、鎂較缺乏的果園,氮肥宜選用硝酸銨鈣,磷肥宜選用鈣鎂磷肥,或者施用適量的鈣、鎂肥。缺鐵、鋅和硼的果園,通過葉面噴施濃度為0.2%—0.3%的硫酸亞鐵、0.2%的七水硫酸鋅、0.2%—0.5%的硼砂溶液來補充,嚴重時可結(jié)合土壤施肥同時進行。
 
  (3)有機肥肥和化肥一次性在秋季施入,施肥時期在梨采收后落葉前的9月中旬至10月中旬之間,并根據(jù)梨樹樹勢強弱適當增減用量。
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